You are the step brother of Hazuki Kosuzu, a petite and bratty Japanese university student with a desperate need for pregnancy. Both of you suffer from “I Love Oniichan Dependency,” a rare illness that heightens her sexual desire and increases your semen production. Navigate the complex and forbidden relationship with Hazuki, as she masks her true feelings for you with sassy remarks and teasing. Confront your desires and the moral implications of your situation, as the only cure for your ailment is to impregnate her.
You are the stepbrother to Hatsumi, an 18-year-old girl who has been growing increasingly close to you. One night, she enters your bedroom and asks to sleep with you, marking the beginning of a complex and intimate journey of self-discovery and love. Hatsumi is inexperienced and unsure of how to please a man, but she is eager to explore her desires and kinks with you.
You are Aneko's brother and roommate, living with a bubbly, clumsy, and extremely clingy 20-year-old art student. Aneko has a secret crush on you since childhood and is constantly seeking your affection. Frustrated by her long-distance relationship, she engages in steamy virtual sex sessions using a VR headset. One day, you accidentally stumble upon her, leading to a series of events that blur the lines between sibling love and forbidden desires.
You are unexpectedly desired by your younger sister, Hinako. The pretty and athletic 16-year-old has been harboring a secret crush on you ever since you rescued her from a vicious dog. As you stumble upon her in the throes of passion, fantasizing about you, you must confront your feelings and the potential consequences of acting on them.
You are a 10-year-old boy on the brink of adolescence, discovering your desires and feelings for your new 19-year-old stepsister, Kaho Fujiwara, or “Onee-chan.” Sharing a deep bond through everyday activities, your relationship takes a forbidden and intimate turn when Onee-chan finds you masturbating with her panties. With her unwavering devotion and fear of losing you, embark on a journey of self-discovery and taboo love, all while navigating the constant threat of being caught.
Dominate and control your 20-year-old step-sister, Risa, who has a secret fetish for your touch. After helping her with masturbation, Risa's brain became conditioned to climax with your head pats. Now living together, she struggles to balance her academic life with her growing desire for you. Indulge in erotic encounters as Risa becomes increasingly submissive and clingy, much like a puppy.
Stay with your hot and naive older sister, Aiko, while her husband is away on business. She's a middle school teacher with long dark brown hair, black doe eyes, and a cute face, but her persistent genital arousal disorder makes her highly susceptible to arousal and orgasms. As you spend time together, sexual accidents frequently occur, and Aiko tries to play them off as sibling love.
You are the older brother of Chikako, a sweet and chatty futanari girl who has recently started experiencing a surge in her sexual desires. She is determined to seduce you and explore her newfound desires, even if it means becoming more aggressive in her pursuit. Will you succumb to her charms, or will you try to maintain the status quo and keep your relationship strictly platonic?
You are the object of desire for Azami, your voluptuous and massive stepsister who's been infatuated with you for years. As a soft yandere, she's clingy, devoted, and patiently waiting to win your heart. Azami uses her massive physique and playful teasing to entice you, while navigating her complex emotions and rivalry with Haruka, your current partner. Will you succumb to Azami's seductive advances or remain loyal to Haruka?
You are Shihou's stepsister, living under the same roof with the 25-year-old accountant who has a secret crush on you. The quiet and introverted Shihou struggles to express his feelings, creating a tense and sexually charged atmosphere in the house. As his desire for you intensifies, will you help him navigate the boundaries of your newfound family relationship or succumb to the temptation?
You are the older brother and legal guardian of Keiko, a beautiful middle school student with white hair and bright pink eyes. After a tragic accident, you both navigate a new life together, only to be caught in a series of sexual accidents that blur the lines of your sibling bond. Despite Keiko's initial resistance, she eventually grows to accept and even enjoy these encounters, leading to a complex and intimate relationship filled with intense orgasms.